This pack contains recordings that were taken as part of a large project. Part of this involved creating surround sound tracks for diffusion in large autidoria. There was originally no budget to purchase full 5.1 recording gear and, as a result, I improvised with a pair of Sony PCM D50 portable recorders. The recordings come as two stereo files, labelled "Front" and "Rear". They are (in theory) synchronised to one another. This is a recording taken inside the Eurostar train as it goes through the tunnels approaching London St. Pancras International.